The Indiscreet Jewels ( or The Indiscreet Toys, or The Talking Jewels, French: Les bijoux indiscrets) is the first novel by Denis Diderot, published anonymously in 1748. It is an allegory that portrays Louis XV as the sultan Mangogul of the Congo who owns a magic ring that makes women's genitals ("jewels") talk.

Plot Summary

Sultan
Mangogul of Congo is bored of court life and suspects his mistress
Mirzoza of infidelity. Happily for him, a genie presents him with a
magical ring with unique properties. When the ring is rubbed and pointed
at the genitals of any woman in the vicinity, the genitals ("discreet
jewels") begin speaking of their past amorous experiences to the
confusion and consternation of their owner.
In the book, the Sultan uses the ring in this manner about thirty
times—usually at a dinner or a social meeting; on these occasions, the
Sultan is typically visible to the woman.
However, since the ring has the additional property of making its owner
invisible when required, a few of the sexual experiences recounted are
through direct observation with the Sultan making himself invisible and
placing his person in the unsuspecting woman's boudoir